JP3304505B2 - Vehicle seat device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat device which is installed on a floor portion in a vehicle compartment forming portion of a vehicle and is used for an occupant of the vehicle.

[0002]

2. Description of the Related Art In a seat device mounted on a vehicle and used for an occupant, particularly in the case of a driver's seat, an occupant sitting on the seat may take a posture that facilitates driving of the vehicle. It is necessary to be able to stably support the whole body and to reduce the degree of fatigue even when sitting for a long time. . Also, in the case of a seat other than the driver's seat, the occupant seated on the seat is stably supported by the whole body, and the degree of feeling of fatigue is small even when sitting for a long time. It is desirable to be in a state where it is performed.

Therefore, a reclining mechanism is provided in a vehicle seat apparatus, and the reclining mechanism adjusts an inclination angle of a seat back portion with respect to a seat cushion portion so that a seated occupant can adjust to the body. What can take a sitting posture etc. is provided for practical use. In addition, for example, Japanese Utility Model Application
As disclosed in Japanese Patent Publication No. 654, a plurality of eccentric rollers extending in the vehicle width direction are vertically arranged in the seat back portion in order to reduce the degree of fatigue of a seated occupant. There has also been proposed a vehicle seat device in which the degree of protrusion of a front portion of a seat back portion that contacts an occupant's upper body can be changed by rotating these eccentric rollers.

[0004] Among the seat devices in which a seated occupant is provided with a reclining mechanism among those in which the fatigue felt by the seated occupant is reduced, for example, a person having an extremely average body size as an occupant sitting on the reclining mechanism may be used. The reference position is assumed to be the position at which the seat back portion can appropriately support the upper body of a person having the extremely average body size, and the rotation of the seat back portion at the reference position is assumed. The inclination angle of the seat back portion with respect to a vertical line passing through the moving axis (hereinafter, simply referred to as the inclination angle) is defined as a reference inclination angle.

[0005]

However, in a seat device of a vehicle provided with a reclining mechanism, the seat back portion has an inclination angle corresponding to the size of the occupant actually sitting or the desired posture. It is difficult to properly support a seated occupant if the vehicle is adjusted to be in a forward position from the reference position, that is, in a so-called front-rear position, or in a rear position from the reference position, in a so-called rear-rear position. Becomes For example, when the seat back portion is placed in the forward leaning position or the backward leaning position, the pressing force becomes excessive for the upper body portion of the seated occupant, and the pressing force is applied to the lower body portion of the occupant. Insufficient or insufficient pressing force is applied to the upper part of the upper body of the seated occupant, and excessive pressing force is applied to the lower part of the upper body. Therefore, when the seat device of the vehicle is used as a driver's seat device, the seat back portion is placed in the forward or backward leaning position, thereby pushing the seated driver particularly against the upper body upper portion. If the pressure is excessive or insufficient, the driver's upper body is not properly supported by the seat back portion, and the degree of feeling of fatigue is increased.

[0006] As a vehicle seat device, there is also known a device provided with a two-part type seat back portion in which an upper portion is rotatably attached to a lower portion. Even in a seat device having a two-part type seat back portion, even when the seat back portion is placed at any of a plurality of different inclination angles, the upper body of the seated occupant can be properly adjusted. Is difficult to support.

In view of the above, according to the present invention, when the tilt angle of the seat back portion can be adjusted by the reclining mechanism portion, the seat back portion can be adjusted to any one of the reference position, the forward leaning position and the rearward leaning position. It is an object of the present invention to provide a vehicle seat device that can appropriately support the upper body of a seated occupant even when the vehicle is placed in the vehicle.

[0008]

In order to achieve the above object, a vehicle seat device according to the present invention includes a seat cushion portion disposed on a floor portion in a vehicle compartment forming portion of a vehicle, and a seat cushion portion of the seat cushion portion. disposed in the rear portion side, the sheet
Movement to change the tilt angle with respect to the
A constant of the rotation range possible with the sheets back portion, and a reclining mechanism which operates to adjust the inclination angle of the seat back portion, is housed in the seat back portion, Shitoba'
At least the upper front part of the
A seat back shape changing means for causing the deformation, Lycra
The seat back moves due to the operation of the inning mechanism.
Control of the seat back shape changing means when
Operation control means for performing , and a seat back shape changing means.
However, the upper end portion that takes the specified maximum extension and the maximum extension
The lower end portion, which is smaller than the maximum extension of the upper end portion,
A, operation control means, the operation of the reclining mechanism
Thus, the seat back portion is moved from a predetermined reference position.
If you are moved to the forward fall position
When changing the seat back shape changing means,
When the length is greater than the extension of the lower end
Retract, and by the operation of the reclining mechanism,
The seat back is behind the reference position
When you can move to the fall-back position,
The shape changing means is adapted so that the extension amount of the upper end portion is
It is configured to move forward with a state greater than the long amount .

[0009]

In the vehicle seat apparatus according to the present invention having the above-described structure, when the reclining mechanism is operated to adjust the seat back to change the position, the seat is adjusted in accordance with the adjustment. Since at least the upper front portion of the back portion is partially advanced and retreated, the shape of the seat back portion is changed. As a result, the upper body of the occupant on which the seat back portion is seated is appropriately supported. Concrete
Specifically, the seat back moves from the reference position to the
When moved, it had an upper end portion and a lower end portion
The seat back shape changing means reduces the amount of extension at the upper end
Retreat with a state that is larger than the extension of the end part,
Along with that, the upper front part of the seat back also
The part corresponding to the upper end side of the
A portion corresponding to the lower end portion of the seat back shape changing means
Retreat with a movement amount that is greater than the movement amount of
By changing the shape of the seat back part,
As a result, the seat back moves from the reference position to the
Properly supports the upper body of a seated occupant even when dropped
It will be. Also, the seat back part falls backward from the reference position.
The upper and lower sides
The seat back shape changing means with
In the state where the extension amount is larger than the extension amount
Forward, and accordingly, the front
The surface also corresponds to the upper end side of the seat back shape changing means
Part that corresponds to the lower end of the seat back shape changing means.
Move forward with a movement amount larger than the movement amount of the corresponding part
The shape of the seat back part has been changed
As a result, the seat back part falls back from the reference position.
The seated occupant's upper body even when
It will be supported by. Therefore, even when any of the plurality of different inclination angles of the seat back portion is maintained for a relatively long time, the seated occupant can properly support the upper body of the seat back portion by the seat back portion. , The degree of fatigue is reduced.

[0010]

FIG. 1 shows the structure of an example of a vehicle seat device according to the present invention. The example shown in FIG. 1 is for a driver, for example, and is provided with a seat cushion portion 1 disposed on a floor portion in a vehicle compartment forming portion of a vehicle, and a headrest 3 provided on the upper portion thereof. And a seat back portion 2 disposed on a rear portion side of the portion 1.
A pair of fixing brackets 5 (one not shown) are attached to the left and right sides of the seat cushion unit 1, respectively, and a reclining mechanism operation operating unit 6 is mounted on one side of the seat cushion unit 1. Is provided. On the other hand, a pair of movable brackets 7 (one not shown) are attached to the left and right sides of the seat back 2 respectively. Each of the fixed brackets 5 attached to the seat cushion unit 1 and each of the movable brackets 7 attached to the seat back unit 2 are connected by a rotating shaft member 10 that supports the seat back unit 2 so as to be able to rotate. The fixed bracket 5, the movable bracket 7, the reclining mechanism operating section 6, and the rotating shaft member 10 constitute a part of the reclining mechanism. When the reclining mechanism operation operation unit 6 provided on the seat cushion unit 1 is operated, the seat back unit 2 is rotated around the rotation shaft member 10 as a fulcrum.

In the seat back portion 2, there is provided a seat back body 15 to which a headrest holder member 11 is attached at an upper portion. The seat back body 15 is
A first flat plate portion 15A that extends along the front surface of the seat back portion 2 and a pair of second flat plates 15A that are bent toward the vehicle rear side and extend in the vertical direction from the left and right ends of the first flat plate portion 15A. (One of which is not shown), and the first and second flat portions 15B.
An upper opening 16 and a lower opening 17 formed by A and 15B are provided. Each of the second flat plate portions 15B of the seatback body 15 is provided with a pipe-shaped frame member 18 having both ends connected to an upper end and a lower end thereof. Further, the headrest holder member 11 is provided with a first flat plate-like portion 15A.
On the back side of the vehicle, it extends in the vehicle width direction and is rotatably supported by a support member 12 attached to a pipe-shaped frame member 19 connecting the pair of second flat plate-shaped portions 15B.

The seat back body 15 is provided with an upper seat back shape changing means 20A and a lower seat back shape changing means 20B. The upper seat back shape changing means 20A includes a plurality of plate members A1 to A6 extending along the vehicle width direction, and a plurality of link mechanisms 22 (a pair provided for each of the plate members A1 to A6). (One of the pair of link mechanisms 22 is not shown in the drawing). The plurality of plate-like members A1 to A6 are arranged and arranged at a predetermined distance from each other from the upper end to the lower end of the upper opening 16, and the plurality of connecting members 2 are arranged.
3 and movably connected by 3 to cover the upper opening 16 provided in the seat back body 15 as a whole.
The upper part of the upper part of the driver which contacts the front part of the seat back part 2 is formed by a plate-like member A1, and the lower part of the support part is formed by a plate. It is comprised by the shape member A6. Then, both ends of each of the plate members A1 to A6 and a pair of second
Are connected via a plurality of link mechanisms 22.

[0013] The lower seat back shape changing means 20B includes:
A plurality of plate members B1 to B6 each extending along the vehicle width direction
And a plurality of link mechanisms 24 provided in pairs for each of the plate members B1 to B6.
Is not shown in the figure). The plurality of plate members B1 to B6 are arranged and arranged with a predetermined separation distance from each other from the upper end to the lower end of the lower opening 17, and are movably connected by the plurality of connecting members 23, The entirety covers the lower opening 17 provided in the seat back body 15, and forms a supporting portion for the lower part of the upper body of the driver abutting on the front portion of the seat back portion 2. The upper end of the portion is a plate-like member B1
And the lower end of the support portion is a plate-like member B6.
It consists of. And these plate-shaped members B1
Each of B6 and each of the pair of second flat plate portions 15B are connected via a plurality of link mechanisms 24.

Each of the plurality of link mechanisms 22 in the upper seat back shape changing means 20A and the plurality of link mechanisms 24 in the lower seat back shape changing means 20B.
2 and 3 have substantially the same configuration as shown in FIGS. 2 and 3, and are supported by brackets 26 attached to the inner surfaces of the pair of second plate members 15B via bolts 25. And a pair of feed screw members 27 that are arranged to face each other along the vertical direction, a pair of moving engagement members 28 that engage with each of the feed screw members 27, and one end of the pair of moving engagement members 28. And a link portion 29 that performs a pantograph-type expansion / contraction operation substantially along the vehicle front-rear direction by moving the moving engagement member 28 along the feed screw member 27. Is the motor 31 attached to the bracket 26
The operation is controlled by a link drive unit 30 including

Of the plurality of link mechanisms 22, a pair of second
Of each of the flat portions 15B supported by the bracket 26 via the bracket 26, the link portion 29 moves to one end of the corresponding one of the plate-shaped members A1 to A6 via the support member 21. The link portion 29 is attached to each of the pair of second flat plate portions 15B and supported by the bracket 26 on the other of the pair of second flat plate portions 15B.
The other of the corresponding ones of the plate members A1 to A6 is swingably attached via a support member 21 to the other end. On the other hand, in each of the plurality of link mechanisms 24, which is supported by one of the pair of second flat plate portions 15B via the bracket 26, the link portion 29 has the plate member B1.
B6 to one end of a corresponding one of the pair of second flat plate portions 15B supported by a bracket 26 on the other end of the corresponding one of the pair of second flat plate portions 15B. In addition, the link portion 29 is provided on the other end of the corresponding one of the plate-shaped members B1 to B6.
1 so as to be movable.

On the other hand, a link drive section 30 for controlling the operation of the link section 29 in each of the plurality of link mechanisms 22 and 24 includes a driven bevel gear 32 attached to the opposite end of each of the pair of feed screw members 27. , A drive bevel gear 33 attached to the output shaft of the motor 31 and engaged with each of the driven bevel gears 32. The drive bevel gear 33 transmits the rotation of the motor 31 to the pair of feed screw members 27 via each of the driven bevel gears 32. As a result, the moving engagement member 28 engaging with the feed screw member 27 is
Depending on the direction of rotation of the motor 1, they are moved in a direction approaching each other or in a direction away from each other. When the moving engagement member 28 that engages with the pair of feed screw members 27 moves in a direction away from each other by the rotation of the motor 31, the link portion 29 is contracted. In addition, when the moving engagement members 28 that engage with the pair of feed screw members 27 move in directions approaching each other due to the rotation of the motor 31, the link portions 29 are extended. The link portion 29 is in a reference state as shown in FIG. 3 when each of the pair of moving engagement members 28 is located at a substantially central portion of the feed screw member 27 with which the pair is engaged.

Therefore, the upper seat back shape changing means 2
When the link portions 29 of each of the plurality of link mechanisms 22 are reduced, the plate members A1 to A6 of 0A are retracted in accordance with the contraction, so that the upper front portion of the seat back portion 2 is retracted. When the link portion 29 in each of the 22 extends, it is moved forward with it,
The upper front portion of the seat back portion 2 is advanced, whereby the upper portion of the seat back portion 2 is deformed. Similarly, the plate members B1 to B6 of the lower seatback shape changing means 20B also have a plurality of link mechanisms 24.
When the link portions 29 of each of the plurality of link mechanisms 24 are retracted, the lower front portions of the seat back portion 2 are retracted, and when the link portions 29 of each of the plurality of link mechanisms 24 are extended, they are advanced accordingly. Then, the lower front portion of the seat back portion 2 is advanced, and the lower portion of the seat back portion 2 is deformed.

Such upper-side seat back shape changing means 20
Of the link portions 29 provided in each of the plurality of link mechanisms 22 in A, a pair of link portions 29 connected to both ends of each of the plate-like members A3 to A6 have the same maximum extension amount. The pair of link portions 29 that are formed and connected to both ends of the plate-like member A2 have a maximum extension amount of the pair of link portions 29 that are connected to both end portions of each of the plate-like members A3 to A6. The pair of link portions 29 which are formed so as to be larger than the maximum extension and which are connected to both ends of the plate-like member A1 have a maximum extension amount which is connected to both ends of the plate-like member A2. Is formed so as to be larger than the maximum extension amount of the link portion 29 of FIG. On the other hand, the link portions 29 provided in each of the plurality of link mechanisms 24 in the lower seat back shape changing means 20B are formed so that the maximum extension amounts are the same, and the maximum extension amount is the upper seat back. Plate members A1 to A in shape changing means 20A
4 is smaller than the maximum amount of extension of a pair of link portions 29 connected to both end portions of each.

The plurality of link portions 29 formed as described above
In the upper seat back shape changing means 20A having the above, the amount of extension of the link portions 29 of the plurality of link mechanisms 22 when the link portions 29 are in the reference state is determined by the seat back corresponding to each of the plate members A1 to A6. Each part of the upper front part of the part 2 is set so as to take a position that appropriately presses the upper part of the upper body of the driver who sits on the seat cushion part 1 as a whole. Similarly, even in the lower seatback shape changing means 20B, the extension amounts of the link portions 29 of the plurality of link mechanisms 24 when the link portions 29 are in the reference state correspond to the plate members B1 to B6, respectively. Each portion of the lower front portion of the seat back portion 2 is set to take a position that appropriately presses the lower portion of the upper body of the driver who sits on the seat cushion portion 1 as a whole.

On the other hand, the headrest holder member 11
As shown in FIG. 4, the support member 12 is connected to an actuator 37 via a shaft member 36 passing through one of a pair of long holes 35 provided at an intermediate portion between left and right sides of the support member 12, and 12 is attached to the lower part of the left and right sides via a pair of pin members 38.
Such a headrest holder member 11 is swung about the pin member 38 as a fulcrum within the range regulated by the elongated hole 35 by the operation of the actuator 37. Further, the headrest holder member 11 is provided with a plurality of through holes 42 into which a pair of support shafts 41 (one of which is not shown) extending from the headrest frame member 40 shown in FIG. 5 is inserted. The headrest frame member 40 is supported by the headrest holder member 11 via a pair of support shafts 41, and swings with the headrest holder member 11 when the headrest holder member 11 is swung, so that the angle of the headrest 3 with respect to the seatback portion 2. To change.

As shown in FIG. 5, the movable reference line Q, which is a representative line of the seat back portion 2 passing through the center of the rotation shaft member 10, is connected to the axis of the rotation shaft member 10, as shown in FIG. An angle θ with respect to a fixed reference line X which is a vertical line passing through the center,
For example, a position inclined about 21.5 degrees is set as a reference position. The inclination angle of the movable reference line Q with respect to the fixed reference line X is the inclination angle of the seat back portion 2 and the angle θ
Is a reference inclination angle for the seat back portion 2. When the seat back portion 2 is at the reference position as shown in FIG.
The plurality of link portions 29 in each of 0A and the lower seatback shape changing means 20B are in the reference state. As described above, when the plurality of links 29 in each of the upper seat back shape changing unit 20A and the lower seat back shape changing unit 20B are in the reference state, the seat back unit 2 is operated to be seated on the seat cushion unit 1. It has a shape that appropriately supports the entire upper body of the person. Also,
When the plurality of links 29 in each of the upper seat back shape changing means 20A and the lower seat back shape changing means 20B are in the reference state, the headrest 3 is moved by the headrest frame member 40 as shown in FIG. The driver is positioned at a reference position that appropriately supports the head of the driver sitting on the seat cushion 1.

An angle sensor 50 (FIG. 1) is attached to the rotating shaft member 10 constituting the reclining mechanism. The angle sensor 50 is configured such that the seat back portion 2, which is operated and rotated by the reclining mechanism operation operation portion 6,
When the driver seated on the seat cushion unit 1 is rotated within a range in which the driver can take a position in which the driver can actually drive, the seat back unit 2 is moved from the reference position to a position forward of the reference position. The respective states of taking the fall position, the backward position from the reference position to the rear side, the forward position to the reference position, and the backward position to the reference position are rotated with the rotation of the seat back portion 2. The angle is detected by detecting the angular position of the movable bracket 7 with respect to the fixed bracket 5 and, as shown in FIG. 6, a detection output signal SL1, SL2, SL3 or SL4 corresponding to the detection result is sent to the control signal forming unit 51. I do. The angle position of the movable bracket 7 with respect to the fixed bracket 5 detected by the angle sensor 50 is set to a position approximately 90 degrees larger than the angle position of the movable reference line Q with respect to the fixed reference line X. Detection output signal SL
Reference numerals 1, SL2, SL3, and SL4 indicate changes in the inclination angle of the seat back portion 2.

The control signal forming section 51 includes the seat back section 2
Is smaller than the reference tilt angle θ.
When the detection output signal SL1 is supplied, the control signal SM1 is formed, and the detection output indicates that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to a larger inclination angle θ2. The control signal SM2 is formed when the signal SL2 is supplied, and the control signal SM3 is formed when the detection output signal SL3 indicating that the inclination angle of the seat back portion 2 is changed from the inclination angle θ1 to the reference inclination angle θ is supplied. Further, a detection output signal S indicating that the tilt angle of the seat back portion 2 has changed from the tilt angle θ2 to the reference tilt angle θ.
When L3 is supplied, a control signal SM4 is formed. Then, the control signals SM1, SM2, SM3 or S
M4 is supplied to the plurality of motor driving units 52A, the plurality of motor driving units 52B, and the actuator driving unit 53.

The plurality of motor driving units 52A include a plate-like member A
A set of two motors 31 for controlling the operation of each of a pair of link mechanisms 22 provided for one, and two sets for controlling the operation of each of a pair of link mechanisms 22 provided for the plate-shaped member A2. A set of two motors 31 for controlling the operation of a set of motors 31 and a pair of link mechanisms 22 provided for the plate member A3, and a pair of link mechanisms 22 provided for the plate member A4. Two motors 3 for controlling the operation of each
One set, two sets of motors 31 for controlling operation of each of a pair of link mechanisms 22 provided for the plate member A5;
And a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 22 provided for the plate member A6,
Each is provided correspondingly. Further, it includes a plurality of motor driving units 52A, a link driving unit 30, an angle sensor 50, and a control signal forming unit 51, each of which includes two motors 31 corresponding to each of the motor driving units 52A. Thus, an operation control unit for the upper seat back shape changing unit 20A is configured.

The plurality of motor driving units 52B include a plate-shaped member B
A set of two motors 31 for controlling the operation of each of a pair of link mechanisms 24 provided for each of the two, and two sets for controlling each of the pair of link mechanisms 24 provided for the plate-shaped member B2. A set of two motors 31 for controlling operation of a set of motors 31 and a pair of link mechanisms 24 provided for the plate member B3, and a pair of link mechanisms 24 provided for the plate member B4. Two motors 3 for controlling the operation of each
One set, two sets of motors 31 for controlling the operation of each of a pair of link mechanisms 24 provided for the plate member B5;
And a set of two motors 31 for controlling the operation of each of the pair of link mechanisms 24 provided for the plate member B6,
Each is provided correspondingly. The link drive unit 30, the angle sensor 50, and the control signal forming unit 51, each of which includes a plurality of motor drive units 52B, two motors 31 corresponding to each of the motor drive units 52B, respectively. Thus, an operation control unit for the lower seatback shape changing unit 20B is configured.

A plurality of motor driving units 52A constituting an operation control unit for the upper seat back shape changing means 20A.
Is a control based on a detection output signal SL1 indicating that the tilt angle of the seat back unit 2 has changed from the reference tilt angle θ to the tilt angle θ1, that is, the fact that the seat back unit 2 has been moved from the reference position to the forward tilt position. When the signal SM1 is supplied, the drive signals AA1, AA2,..., AA5, and AA6 are respectively transmitted, and the inclination angle of the seat back unit 2 is changed from the reference inclination angle θ to the inclination angle θ2, that is, the seat When the control signal SM2 based on the detection output signal SL2 indicating that the back portion 2 has been moved from the reference position to the backward position is supplied,
The drive signals AB1, AB2,..., AB5 and AB6 are sent out respectively, and the inclination angle of the seat back unit 2 has changed from the inclination angle θ1 to the reference inclination angle θ, that is,
When the control signal SM3 based on the detection output signal SL3 indicating that the control signal has been moved from the forward fall position to the reference position is supplied, the drive signals AC1, AC2,.
6 respectively, and furthermore, a detection indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ2 to the reference inclination angle θ, that is, the fact that the seat back portion 2 has been moved from the backward falling position to the reference position. Control signal SM4 based on output signal SL4
Are supplied, the drive signals AD1, AD2,.
D5 and AD6 are sent out, respectively.

The drive signals AA1, AA2,..., AA5 and A sent from the plurality of motor drive units 52A
A6, drive signals AB1, AB2,..., AB5 and A
B6, drive signals AC1, AC2,..., AC5 and A
C6 or drive signals AD1, AD2,..., A
D5 and AD6 are a set of two motors 31 for controlling the operation of a pair of link mechanisms 22 provided for the plate member A1, respectively, and a pair of link mechanisms 22 provided for the plate member A2. A set of two motors 31 for controlling the operation of each, a set of two motors 31 for controlling the operation of each of a pair of link mechanisms 22 provided for the plate member A3, and a set for the plate member A4 A set of two motors 31 for controlling the operation of each of the paired link mechanisms 22 and a plate-like member A5
And a pair of two motors 31 for controlling the operation of each of the pair of link mechanisms 22 provided for the first and second members for controlling the operation of each of the pair of link mechanisms 22 provided for the plate-shaped member A6. Of the motors 31 are supplied respectively.

A plurality of motor driving units 52B constituting an operation control unit for the lower seat back shape changing means 20B.
When the control signal SM1 based on the detection output signal SL1 indicating that the inclination angle of the seat back portion 2 has become the inclination angle θ1 from the reference inclination angle θ is supplied, the driving signals BA1,
BA2,..., BA5 and BA6 are sent out respectively, and a control signal SM2 based on a detection output signal SL2 indicating that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ2 is supplied. , Drive signals BB1, BB2,
, BB5 and BB6, respectively, and a control signal SM based on a detection output signal SL3 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ1 to the reference inclination angle θ.
3, the drive signals BC1, BC2,.
BC5 and BC6, respectively, and furthermore, a control signal SM based on a detection output signal SL4 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ2 to the reference inclination angle θ.
4 are supplied, the drive signals BD1, BD2,.
Send BD5 and BD6 respectively.

Drive signals BA1, BA2,..., BA5 and B sent from the plurality of motor drive units 52B
A6, drive signals BB1, BB2,..., BB5 and B
B6, drive signals BC1, BC2,..., BC5 and B
C6 or drive signals BD1, BD2,..., B
D5 and BD6 are a set of two motors 31 for controlling operation of a pair of link mechanisms 24 provided for the plate member B1, respectively, and a pair of link mechanisms 24 provided for the plate member B2. A set of two motors 31 for controlling the operation of each, a set of two motors 31 for controlling the operation of each of a pair of link mechanisms 24 provided for the plate-shaped member B3, and provided for the plate-shaped member B4. Set of two motors 31 for controlling the operation of each of the paired link mechanisms 24, a plate member B5
And two sets of motors 31 for controlling the operation of each of the pair of link mechanisms 24 provided for the plate member B2, and two sets for controlling the operation of each of the pair of link mechanisms 24 provided for the plate-shaped member B6. Of the motors 31 are supplied respectively.

On the other hand, the actuator driving section 53 is provided corresponding to the actuator 37 provided for the headrest holder member 11. Such an actuator drive unit 53 sends out the drive signal SAA when the control signal SM1 based on the detection output signal SL1 indicating that the tilt angle of the seat back unit 2 has changed from the reference tilt angle θ to the tilt angle θ1 is supplied. When the control signal SM2 based on the detection output signal SL2 indicating that the inclination angle of the seat back unit 2 has become the inclination angle θ2 from the reference inclination angle θ is supplied, the driving signal SAB is sent out and the seat back unit 2 is transmitted. When the control signal SM3 based on the detection output signal SL3 indicating that the tilt angle of the seat back has changed from the tilt angle θ1 to the reference tilt angle θ is supplied, the driving signal SAC is transmitted, and the tilt angle of the seat back portion 2 is further reduced. When the control signal SM4 based on the detection output signal SL4 indicating that the inclination angle θ2 has become the reference inclination angle θ is supplied, the driving signal SAD is transmitted.
Drive signal SA sent from actuator drive unit 53
A, SAB, SAC or SAD is supplied to the actuator 37.

The inclination angle of the seat back 2 is equal to the reference inclination angle θ.
From the detection output signal S indicating that the inclination angle has become θ1
.., AA5 and AA6 respectively transmitted from the plurality of motor driving units 52A based on L1.
It is gradually shortened in the order of 6. As a result, a plurality of sets of the two motors 31 to which the drive signals AA1, AA2,..., AA5 and AA6 are respectively supplied are, for example, rotated forward with mutually different durations. As described above, when the plurality of motors 31 forming a group and constituting the operation control unit for the upper seat back shape changing means 20A are in the operating state of normal rotation, a pair of moving engagements corresponding to the respective motors 31 are provided. The members 28 are moved in a direction away from each other, and the link portion 29 in the reference state is reduced by a moving amount corresponding to a period during which the motor 31 rotates forward.

The drive signals BA1 and BA1 sent from the plurality of motor drive units 52B based on the detection output signal SL1 indicating that the inclination angle of the seat back unit 2 has become the inclination angle θ1 from the reference inclination angle θ. BA2, ..., BA
The durations of 5 and BA6 are gradually increased in order from the drive signal BA1 to the drive signal BA6. Thereby, a plurality of sets composed of the two motors 31 to which the drive signals BA1, BA2,..., BA5 and BA6 are respectively supplied are, for example, rotated forward with mutually different durations. As described above, the plurality of motors 3 that constitute a set of operation control units for the lower seatback shape changing unit 20B are configured.
When the motor 1 is in an operating state in which the motor 31 rotates forward, the motors 31
Are moved in the direction away from each other, and the link portion 2 in the reference state is moved.
9 is reduced by a moving amount corresponding to a period during which the motor 31 rotates forward.

As a result, when the seat back portion 2 is moved from the reference position to the forward leaning position, the plate members A1 to A6 are moved with a smaller moving amount in order from the plate member A1 to the plate member A6. In FIG. 7, the plate members B1 to B6 are retracted from the position indicated by the alternate long and short dash line to the position indicated by the solid line, and move in the order from the plate member B1 to the plate member B6. Is retracted from the position indicated by the dashed line to the position indicated by the solid line. And those plate-shaped members A
With the retreat of the plate members A1 to A6 and the plate members B1 to B6, the seat back portion 2
7 and a plurality of portions corresponding to the plate-like members B1 to B6 in the lower front surface thereof are indicated by solid lines in FIG. 7 from positions indicated by dashed lines in FIG. A deformation occurs that retracts to the position as shown. In such a case, the reduction amount of the link portion 29 in each of the plurality of link mechanisms 22 and the link mechanisms 24 that determine the shape of the seat back portion 2 is determined by the amount of the seat back portion 2 placed in the forward tilted position. The upper part of the upper body and the lower part of the upper body of the driver sitting on the vehicle are appropriately pressed to favorably support the entire upper body of the driver. Thereby, even when the seat back portion 2 is in the front-rear position for a relatively long period of time, the driver sitting on the seat cushion portion 1 has its entire upper body well supported by the seat back portion 2. Therefore, the degree of feeling of fatigue is reduced.

On the other hand, when the drive signal SAA is supplied to the actuator 37 based on the detection output signal SL1 indicating that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ1, the actuator 37 During a predetermined period of time, for example, the headrest holder member 11 is rotated forward to swing backward. Along with this, the headrest frame member 40 swings rearward from the position shown by the dashed line in FIG. 7, and assumes the position shown by the solid line in FIG. Due to the swing of the headrest frame member 40, the angle of the headrest 3 with respect to the seatback portion 2 is changed, and the headrest 3 is deformed due to partial retreat of the upper front portion and the lower front portion thereof. During the period of occurrence, it is displaced from the position shown by the dashed line in FIG. 7 to the position shown by the solid line in FIG. Seat back part 2
Accordingly, the driver's head whose upper body is supported is appropriately supported. As a result, the degree of feeling of fatigue of the driver whose upper body is supported by the seat back portion 2 placed at the front falling position is effectively reduced.

The inclination angle of the seat back 2 is equal to the reference inclination angle θ.
From the detection output signal S indicating that the inclination angle has become θ2.
Based on L2, the durations of the drive signals AB1, AB2,..., AB5 and AB6 respectively sent from the plurality of motor drive units 52A vary from the drive signal AB1 to the drive signal AB.
It is gradually shortened in the order of 6. As a result, the sets of two motors 31 to which the drive signals AB1, AB2,..., AB5 and AB6 are respectively supplied are, for example, reversed with different durations. As described above, when the plurality of motors 31 forming an operation control unit for the upper seat back shape changing means 20A are put into an operating state in which the motors 31 rotate in reverse, a pair of moving engagement members corresponding to each of the motors 31 is provided. 28 are moved in a direction of approaching each other, and the link portion 29 in the reference state extends with a movement amount corresponding to a period during which the motor 31 rotates in the reverse direction.

Drive signals BB1 and BB1 respectively transmitted from the plurality of motor driving units 52B based on a detection output signal SL2 indicating that the inclination angle of the seat back unit 2 has changed from the reference inclination angle θ to the inclination angle θ2. BB2, ..., BB
5 and BB6 are gradually lengthened in order from the drive signal BB1 to the drive signal BB6. The sets of two motors 31, to which the drive signals BB1, BB2,..., BB5 and BB6 are respectively supplied, are then reversed, for example, with mutually different durations. As described above, the plurality of motors 3 that constitute a set of operation control units for the lower seatback shape changing unit 20B are configured.
When the motor 1 is in an operating state in which the motor 31
Are moved in the direction approaching each other, and the link portions 2 in the reference state are moved.
9 extends with a movement amount corresponding to the period in which the motor 31 rotates in the reverse direction.

As a result, when the seat back portion 2 is moved from the reference position to the rearward position, the plate members A1 to A6 are moved by the moving amount which becomes smaller in order from the plate member A1 to the plate member A6. In FIG. 8, the plate members B1 to B6 are advanced from the position indicated by the alternate long and short dash line to the position indicated by the solid line, and are moved in the order from the plate member B1 to the plate member B6. Is advanced from the position indicated by the dashed line to the position indicated by the solid line. And those plate-shaped members A
As the plate-like members A1 to A6 and the plate-like members B1 to B6 advance, the seat back portion 2
8, and a plurality of portions respectively corresponding to the plate-shaped members B1 to B6 on the lower front surface thereof are indicated by solid lines in FIG. 8 from positions indicated by dashed lines in FIG. 8. This results in a deformation that advances to the position as shown. In such a case, the extension amount of the link portion 29 in each of the plurality of link mechanisms 22 and the link mechanisms 24 that determine the shape of the seat back portion 2 is such that the seat back portion 2 placed in the rearwardly falling position has the seat cushion portion 1. The upper part of the upper body and the lower part of the upper body of the driver sitting on the vehicle are appropriately pressed to favorably support the entire upper body of the driver. Thereby, even when the seat back portion 2 is in the rearwardly falling position for a relatively long period of time, the driver sitting on the seat cushion portion 1 is favorably supported by the seat back portion 2 on the entire upper body. Therefore, the degree of feeling of fatigue is reduced.

On the other hand, when the drive signal SAB is supplied to the actuator 37 based on the detection output signal SL2 indicating that the inclination angle of the seat back portion 2 has changed from the reference inclination angle θ to the inclination angle θ2, For a predetermined period, for example, the headrest holder member 11 is swung to the front side by being reversed. Along with this, the headrest frame member 40 swings forward from the position shown by the dashed line in FIG. 8, and assumes the position shown by the solid line in FIG. Due to the swing of the headrest frame member 40, the angle of the headrest 3 with respect to the seat back portion 2 is changed, and the headrest 3 is deformed by the partial forward movement of the upper front portion and the lower front portion of the seat back portion 2. During the period of occurrence, displacement is made from the position shown by the dashed line in FIG. 8 to the position shown by the solid line in FIG. Seat back part 2
Accordingly, the driver's head whose upper body is supported is appropriately supported. As a result, the degree of fatigue of the driver whose upper body is supported by the seat back portion 2 placed at the rearwardly falling position is effectively reduced.

A detection output signal S indicating that the tilt angle of the seat back portion 2 has changed from the tilt angle θ1 to the reference tilt angle θ.
., AC5 and AC6 respectively sent from the plurality of motor driving units 52A based on L3.
6 and the drive signal AC
The sets of two motors 31, supplied with AC1, AC2,..., AC5 and AC6, respectively, are reversed with different durations. As a result, the link portion 29 whose operation is controlled by the motor 31 forming the set
Is extended with an amount of movement corresponding to the period during which the corresponding motor 31 rotates in the reverse direction.

The drive signals BC1, BC2 and BC2 sent from the motor drive section 52B based on the detection output signal SL3 indicating that the tilt angle of the seat back portion 2 has changed from the tilt angle θ1 to the reference tilt angle θ. ..., the duration of BC5 and BC6 varies from the drive signal BC1 to the drive signal BC
6, and the drive signal BC
The sets of two motors 31, supplied respectively with 1, BC2,..., BC5 and BC6, are reversed with mutually different durations. As a result, the link portion 29 whose operation is controlled by the motor 31 forming the set
Is extended with an amount of movement corresponding to the period during which the corresponding motor 31 rotates in the reverse direction.

As a result, when the seat back portion 2 is moved from the forward leaning position to the reference position, similarly to when the seat back portion 2 is moved from the reference position to the backward leaning position,
The plate-like members A1 to A6 are advanced and the plate-like members B1 to B6 are advanced, and accordingly, the seatback portion 2 is moved to the plate-like member A1 at the upper front portion thereof.
A6, and a plurality of portions respectively corresponding to the plate-like members B1 to B6 in the lower front surface portion thereof are deformed to move forward. In such a case, the extension amount of the link portion 29 in each of the plurality of link mechanisms 22 and the link mechanisms 24 that determine the shape of the seat back portion 2 is:
It is assumed that they will be returned to the reference state. As a result, the seat back portion 2 placed at the reference position from the forward leaning position appropriately adjusts the upper body upper portion and the lower body portion of the driver sitting on the seat cushion portion 1 as shown in FIG. , And has a shape that favorably supports the entire upper body of the driver. Thus, even when the seat back portion 2 is in the reference position for a relatively long period, the driver sitting on the seat cushion portion 1 has its entire upper body well supported by the seat back portion 2. Therefore, the degree of feeling fatigue is reduced.

On the other hand, when the drive signal SAC is supplied to the actuator 37 based on the detection output signal SL3 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ1 to the reference inclination angle θ, the actuator 37 is actuated. The headrest holder member 11 is turned over for a predetermined period.
Is swung forward. By the swing of the headrest frame member 40 accompanying the swing of the headrest holder member 11, the angle of the headrest 3 with respect to the seat back portion 2 is changed, and the headrest 3 is moved from the upper front portion and the lower front portion at the reference position. The seat back portion 2 deformed by the partial advance allows the driver to return to the reference position that appropriately supports the driver's head whose upper body is supported. As a result, the degree of fatigue of the driver whose upper body is supported by the seat back portion 2 placed at the reference position is effectively reduced.

Further, based on a detection output signal SL4 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ2 to the reference inclination angle θ, the driving signals AD1 and AD1 respectively transmitted from the plurality of motor driving portions 52A. AD2, ..., A
The duration of D5 and AD6 is gradually shortened in order from the drive signal AD1 to the drive signal AD6, and the two motors 31 to which the drive signals AD1, AD2,..., AD5 and AD6 are respectively supplied. The sets are rotated with different durations from each other. Thereby,
The link portions 29 whose operation is controlled by the motors 31 forming the group are reduced by a moving amount corresponding to a period during which the corresponding motor 31 rotates forward.

Drive signals BD1 and BD1 respectively transmitted from the plurality of motor driving units 52B based on a detection output signal SL4 indicating that the inclination angle of the seat back unit 2 has become the reference inclination angle θ from the inclination angle θ2. BD2, ..., BD
5 and BD6 are gradually lengthened in order from the drive signal BD1 to the drive signal BD6. The two motors 31 to which the drive signals BD1, BD2,..., BD5 and BD6 are respectively supplied are provided. The sets are rotated with different durations from each other. As a result, the link portions 29 whose operation is controlled by the motors 31 forming the group are reduced with a movement amount corresponding to a period in which the corresponding motor 31 rotates forward.

As a result, when the seat back portion 2 is moved from the rear-falling position to the reference position, similarly to when the seat back portion 2 is moved from the reference position to the front-falling position,
The plate-like members A1 to A6 are retracted, and the plate-like members B1 to B6 are retracted, and accordingly, the seatback portion 2 is moved to the plate-like member A1 at the upper front portion thereof.
A6, and a plurality of portions respectively corresponding to the plate-shaped members B1 to B6 on the lower front surface thereof are retreated. In such a case, the reduction amount of the link portion 29 in each of the plurality of link mechanisms 22 and the link mechanisms 24 that determines the shape of the seat back portion 2 is:
It is assumed that they will be returned to the reference state. Thereby, the seat back portion 2 placed at the reference position from the backward falling position has a shape as shown in FIG.

On the other hand, when the drive signal SAD is supplied to the actuator 37 based on the detection output signal SL4 indicating that the inclination angle of the seat back portion 2 has changed from the inclination angle θ2 to the reference inclination angle θ, the actuator 37 is activated. The headrest holder member 11 is rotated forward for a predetermined period of time.
Swing back. By the swing of the headrest frame member 40 accompanying the swing of the headrest holder member 11, the angle of the headrest 3 with respect to the seat back portion 2 is changed, and the headrest 3 is moved from the upper front portion and the lower front portion at the reference position. The seat back portion 2 deformed by the partial retreat is returned to the reference position which appropriately supports the driver's head whose upper body is supported. As a result, the degree of fatigue of the driver whose upper body is supported by the seat back portion 2 placed at the reference position is effectively reduced.

In the above example, when the inclination angle of the seat back portion 2 changes from the reference inclination angle θ to the inclination angle θ1, when the inclination angle θ2 changes from the reference inclination angle θ, and when the inclination angle θ1 changes. When the reference tilt angle θ is reached, and when the tilt angle θ
2, the upper seat back shape changing means 20A and the lower seat back shape changing means 20B cause deformation of the seat back portion 2 at each of the reference inclination angles θ. In such a vehicle seat device, when the seat back portion is moved within a rotation range in which a seated driver can take a posture capable of actually driving, according to the movement. The upper seat back shape changing means and the lower seat back shape changing means may continuously deform the seat back portion.

Further, in the above example, the upper seat back changing means 20A and the lower seat back changing means 2
Although 0B is provided, in the vehicle seat device according to the present invention, only the upper seat back changing means 20A may be provided, and the lower seat back shape changing means may not be provided.

[0049]

As is apparent from the above description, according to the vehicle seat apparatus of the present invention, when the reclining mechanism is operated to adjust the inclination angle of the seat back portion to be changed, the adjustment is performed. At least the upper front part of the seat back part is partially advanced and retracted,
Since the seat back portion is deformed to one that can properly support the upper body of a seated occupant, the seat back portion can be at any of a plurality of different inclination angles for a relatively long time. Also in the case of a fall, the seated occupant can feel little fatigue because his / her upper body is properly supported by the seat back portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a main part of an example of a vehicle seat device according to the present invention.

FIG. 2 is a cross-sectional view showing a main part shown in FIG.

FIG. 3 is a side view showing a main part shown in FIG. 1;

FIG. 4 is a perspective view showing a headrest holder member arranged in a main part shown in FIG. 1;

FIG. 5 is a diagram provided for explaining the operation of the main part shown in FIG. 1;

FIG. 6 is a block diagram of an operation control unit for a main part shown in FIG. 1;

FIG. 7 is a diagram provided for explaining the operation of the main part shown in FIG. 1;

FIG. 8 is a diagram provided for describing an operation of a main part shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat cushion part 2 Seat back part 3 Headrest 5 Fixed bracket 6 Reclining mechanism operation operation part 7 Movable bracket 10 Rotating shaft member 11 Headrest holder member 15 Seat back body 15A 1st flat part 15B 2nd flat part 20A Upper seat back shape changing means 20B Lower seat back shape changing means 22, 24 Link mechanism 28 Moving engagement member 29 Link section 30 Link drive section 31 Motor 37 Actuator 40 Headrest frame member 50 Angle sensor 51 Control signal forming section 52A, 52B Motor drive unit 53 Actuator drive unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-236913 (JP, A) JP-A-49-28464 (JP, A) JP-A-1-177947 (JP, U) JP-A-61-264 16058 (JP, U) JP-A 4-81554 (JP, U) JP-A 63-199654 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47C 7/46 A47C 1 / 024

Claims (3)

(57) [Claims] 1. A seat cushion portion that is disposed on the floor portion in the vehicle compartment forming part of the vehicle, is arranged on the rear portion side of the seat cushion, the seat
Movement to change the tilt angle with respect to the cushion
A seat back portion made possible within a rotation range; a reclining mechanism portion that operates to adjust a tilt angle of the seat back portion with respect to the seat cushion portion; a seat back shape changing means for causing deformation by partial retreat of at least the upper front part, more the Shitoba' to operation of said reclining mechanism
When the click section is moved, e Bei and a motion control means for controlling the operation of the seat back shape changing means, the seat back shape changing means, a predetermined maximum extension amount
The maximum extension of the upper end and the maximum extension
A lower end portion smaller than the length, and
The means is actuated by the operation of the reclining mechanism section.
The seat back part moves from the predetermined reference position to the reference position.
When it is moved to the front
When the seat back shape changing means is
The extension amount of the portion is set to be larger than the extension amount of the lower end portion.
Retract with the condition, and the reclining mechanism
The seat back is in the reference position
From the above reference position to the rear
When tightened, the seat back shape changing means
The extension amount of the upper end portion is the extension amount of the lower end portion.
It is characterized by moving forward with a greater state
That vehicle of the seat device. 2. A seat back shape changing means for causing deformation of a lower front portion of said seat back portion due to partial advance / retreat in addition to an upper front portion of said seat back portion. Item 2. A vehicle seat device according to item 1. 3. A headrest provided on an upper portion of a seatback portion, and headrest driving means for changing an angle of the headrest with respect to the seatback portion in accordance with an operation of a reclining mechanism portion. Item 2. A vehicle seat device according to item 1.